The ULTIMATE ASUS CT-479 Adapter Modifications...You want MORE...GET IT...

I tried the Vcca mod today by replacing the SMD resistor with a (regular) 1.2KOhm resistor.

I have a Celeron-M 350 (Dothan 13x100Mhz) CPU that wouldn't POST above 165FSB. Well, after the mod it still doesn't :(

Maybe I'm hitting the CPU's limit itself, even though it's cooled with a Zalman Cu7000 with silver grease. I'm thinking it should be able to go higher with this bastard..too bad the multiplier is locked in all directions, so I can't test 6x200..

Looking at the SMD resistor, I wonder if it's truly a 2KOhm? Did you guys measure it? I took a super-macro picture of it with my digicam and looked at that. Seems mine has a '8', something else, and an 'E' or 'F' stamped on it:

http://www.stack.nl/~brama/pics/smd.jpg

Not a very clear picture, thanks to the epoxy gunk :D

Well guys....kits for us Americans (and anybody else who wants to pay a lot for shipping :D) are now available. Head on over to runmc's online store for the full kit.

For those that don't know his store, you can find it here: http://www.under-the-ice.com/index.php

IDK how much stock he has though, so you might want to hurry up ;)

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Originally Posted by Vapor

Well guys....kits for us Americans (and anybody else who wants to pay a lot for shipping :D) are now available. Head on over to runmc's online store for the full kit.

For those that don't know his store, you can find it here: http://www.under-the-ice.com/index.php

IDK how much stock he has though, so you might want to hurry up ;)

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Thanks for the link!
Just ordered myself there! Looks like this weekend will be mod time!

Hey! I had no idea that RunMC had a shop or that there was any shop like that. Thanks for the link and I hope it does well!

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Originally Posted by stragulus

I tried the Vcca mod today by replacing the SMD resistor with a (regular) 1.2KOhm resistor.

I have a Celeron-M 350 (Dothan 13x100Mhz) CPU that wouldn't POST above 165FSB. Well, after the mod it still doesn't :(

Maybe I'm hitting the CPU's limit itself, even though it's cooled with a Zalman Cu7000 with silver grease. I'm thinking it should be able to go higher with this bastard..too bad the multiplier is locked in all directions, so I can't test 6x200..

Looking at the SMD resistor, I wonder if it's truly a 2KOhm? Did you guys measure it? I took a super-macro picture of it with my digicam and looked at that. Seems mine has a '8', something else, and an 'E' or 'F' stamped on it:

http://www.stack.nl/~brama/pics/smd.jpg

Not a very clear picture, thanks to the epoxy gunk :D

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Im a celeron 350 user too... before the mod, i was able to boot at 175fsb. After the vcca mod, im able to boot at 180Mhz. Both jumper setting at 400fsb.

there is this thing that i noticed. The more i increase the Vcore, the more lesser fsb i can boot with. i.e... If i set Vcore to 1.5... The max fsb i can boot with is 175Mhz... however, if i put it to auto, i can boot at 180Mhz.

All testing done on stock cooler. I dun think heat is the issue here as the temperture on the heatsink doesnt feel much difference from default to 1.5V Vcore. really puzzles me.... :confused:

so, hippro, you think the caps i posted about earlier will work?

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Originally Posted by rx8

Im a celeron 350 user too... before the mod, i was able to boot at 175fsb. After the vcca mod, im able to boot at 180Mhz. Both jumper setting at 400fsb.

there is this thing that i noticed. The more i increase the Vcore, the more lesser fsb i can boot with. i.e... If i set Vcore to 1.5... The max fsb i can boot with is 175Mhz... however, if i put it to auto, i can boot at 180Mhz.

All testing done on stock cooler. I dun think heat is the issue here as the temperture on the heatsink doesnt feel much difference from default to 1.5V Vcore. really puzzles me.... :confused:

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Why don't you try to boot with the jumpers placed at 133MHz fsb and see how it does....?

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Originally Posted by cirthix

so, hippro, you think the caps i posted about earlier will work?

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You mean to unsolder those ceramic caps from that mobo and then solder them onto the adapter?......If yes, then there are 2 points....1.They are for the VCore so some of them will do their job.....2.They are for the VCore BUT they might also be at 6Volts rage.....In this case, they'll do their job as for our VCore onto the adapter BUT they will encode problems with the filtering of the 12Volts(maybe sort-circuited).......;)

alright, i'll see if i can get new caps from work. the resistor that we are putting a 3.2komh resistor in paralell with is a 2kohm one, so a 1.2kohm resistor would work as a replacement for the 2kohm and have the same effects, right?

if i can't get different caps, how could i test to see what voltage they are?

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Originally Posted by cirthix

alright, i'll see if i can get new caps from work. the resistor that we are putting a 3.2komh resistor in paralell with is a 2kohm one, so a 1.2kohm resistor would work as a replacement for the 2kohm and have the same effects, right?

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Yes but keep in mind that unsoldering SMD resistors/caps, it's not that simple/easy......Before they soldered, they are glued onto the PCB with some short of strong glue and afterwords they are been soldered.......So trying to unsolder them you may: a. broke them(or their leads) and b. rip off the lines/pads that are soldered on.......The best is just to solder another one onto them in parallel.......;)

After all it's easier to solder another one above them than to unsolder and solder back another one.......

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Originally Posted by hipro5

Yes but keep in mind that unsoldering SMD resistors/caps, it's not that simple/easy......Before they soldered, they are glued onto the PCB with some short of strong glue and afterwords they are been soldered.......So trying to unsolder them you may: a. broke them(or their leads) and b. rip off the lines/pads that are soldered on.......The best is just to solder another one onto them in parallel.......;)

After all it's easier to solder another one above them than to unsolder and solder back another one.......

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if you look close, 4 of them are already gone ;)

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Originally Posted by cirthix

if you look close, 4 of them are already gone ;)

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Why do I love surgery?.......:D

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Originally Posted by hipro5

Why don't you try to boot with the jumpers placed at 133MHz fsb and see how it does....?

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yah, i did. it capped at 180Mhz also.
will add the rest of the mod when im free.

:) thks for the help

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Originally Posted by rx8

yah, i did. it capped at 180Mhz also.
will add the rest of the mod when im free.

:) thks for the help

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I've jumpered the thing at 533Mhz as well (didn't try at 400Mhz actually).

Your 175 is a lot more than my 165 by the way. Nice going :)

My Celeron-M 360 (1.4) could boot up to 178 or something with 400fsb before mod, haven't tried after mod yet, but i currently have highest fsb ever on celeron-M i believe (validated 185)

hipro, I have had some bad luck with soldering and i done sth that i shouldn't. Is there alternative location for soldering resistor for vcca mod. I have unsoldered that 2ko SMD too :(.

can't you resolder the 2k SMD?

pics?

if i could resolder smd i would not need alternative location. I will picture adapter as soon as i get camera. In an hour.

p.s. i have found a word, soldering pad, i have succefuly removed the left pad :(

Pin 2 of the LM324 IC to ground......;)

http://img483.imageshack.us/img483/1...ront9rz5uz.jpg
will these do? and can i asc you, will it work without that 2k smd resistor?

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Originally Posted by zbogorgon

will these do? and can i asc you, will it work without that 2k smd resistor?

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Yes but only if PC6 is grounded.....First trim the trimmer at 2KOhms and then solder it.....

i tested with multimeter and it beeped, so it should be ground, i ll double checked that. I have trimmer at 1.24k.

Well I would like to know more about the differences between the 533 FSB jumpers and the 400 FSB jumpers. Because it sounds to me like the 400 FSB jumper(s) are already providing 1.8 volts. And it's a lot easier and safer to just change some jumpers than to do a resistor mod for the extra voltage.

I had no difference whatsoever between 400 and 533 - it boots at 238FSB max. CT-479 without modifications.

CT-479 with modifications - PM 750@2.86 AIR cooled

http://images.people.overclockers.ru/48928.jpg